Oil leaky from powervalve overflow pipe on YZ 125

[schubeed00]

Hi, Can anyone tell me why I have some drips coming from my powervalve overflow...??

The bike does have the correct amount of gear oil in.

Also its near 30 hours since last top end rebuild can anyone offer advise on what brand piston to use...
Ps I am not a racer so it does not have to be all singing all dancing bank breakingly expensive :nod:

 

[nickyd]

I wouldn't be worried about that at all. Might be time to consider a top end - but only you know how hard you ride it.

 

[Spine_Thrust]

That is supposed to happen on the Yamahas. If you don't see it, you have a problem.

Gear oil has nothing to do with the powervalve vent.

Wiseco or OEM will do, but Wiseco is forged (drop forged) so it should take more abuse and be less likely to break as opposed to OEM which is cast (poured aluminum). Wiseco top end kits are around USD 120.